from experience, i buy and restore/bring trikes back to life... something that deos not run tends to need some TLC. with good plastics and original owner with paperwork. if it has carb but doesnt run and all other parts are there i would say somewhere in the ballpark of $350-375..... CHECK THE DIF FLUID BEFORE MAKING AN OFFER if its murky or muddy or anything like that than offer him $250.... thats gonna be a big deal... they tend to allow water to leak in when riden around water a lot.... racks and plastics and a good motor you can part out for over $350... because you cant hear it run and listent to the valves and check the clutch play than the price in my opinion goes way down.... check dif fluid and if looks good, offer $325... i wouldnt pay more than $450 absolutely maximum
1985 Kawasaki Tecate 250 with kx 500cc motor
1985 Honda ATC 70 custom built with lifan 125cc
1985 Honda ATC 70 custom powder coat slight mods
1985 Honda 250sx
Yamaha zinger 90cc 2 stroke
1985 Honda 250sx custom green and black build
1985 Honda 200x